Statement of Consolidated Cash Flows (unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
CASH FROM OPERATIONS
Net income (loss)	$ 699	$ (276)
Adjustments to reconcile net income (loss) to cash from operations:
Depreciation, depletion, and amortization	301	324
Deferred income taxes	72	(75)
Equity income, net of dividends (H)	(4)	(8)
Restructuring and other charges, net (D)	19	220
Net loss from investing activities - asset and investment sales (P)	2	17
Net periodic pension benefit cost (L)	9	5
Stock-based compensation	23	22
Gain on mark-to-market derivative financial contracts	(82)	(19)
Other	49	31
Changes in assets and liabilities, excluding effects of divestitures and foreign currency translation adjustments:
Decrease (increase) in receivables	149	(283)
(Increase) decrease in inventories	(111)	157
Decrease in prepaid expenses and other current assets	127	23
Decrease in accounts payable, trade	(233)	(57)
Decrease in accrued expenses	(148)	(30)
(Decrease) increase in taxes, including income taxes	(106)	70
Pension contributions (L)	(14)	(10)
(Increase) decrease in noncurrent assets	(97)	25
Decrease in noncurrent liabilities	(92)	(72)
CASH PROVIDED FROM OPERATIONS	563	64
FINANCING ACTIVITIES
Additions to debt (K)	1,040	989
Payments on debt (K)	(990)	(266)
Dividends paid on Alcoa preferred stock	(1)	0
Dividends paid on Alcoa common stock	(52)	(37)
Payments related to tax withholding on stock-based compensation awards	(5)	(15)
Financial contributions for the divestiture of businesses (C)	(5)	(12)
Contributions from noncontrolling interest (C)	27	65
Distributions to noncontrolling interest	0	(32)
Other	(4)	(13)
CASH PROVIDED FROM FINANCING ACTIVITIES	10	679
INVESTING ACTIVITIES
Capital expenditures	(224)	(265)
Proceeds from the sale of assets	0	2
Additions to investments	(29)	(17)
Sale of investments	11	0
Other	2	(1)
CASH USED FOR INVESTING ACTIVITIES	(240)	(281)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS AND RESTRICTED CASH	35	(16)
Net change in cash and cash equivalents and restricted cash	368	446
Cash and cash equivalents and restricted cash at beginning of year	1,234	1,047
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH AT END OF PERIOD	$ 1,602	$ 1,493